[DeTomaso] Movement of air

[Daniel C Jones]

> Did the NASCAR guys not know about the Pantera side boundary air layer or
did they know that their design would work and ignored the boundary layer?

It's not clear if the NASCAR guys were involved in picking the location of
the inlet duct or it chosen by the monkeys.  If the NASCAR guys had chosen
the duct, I would have thought they would have used a NACA inlet.  In any
case, the boundary layer effect is of no consequence since a plain duct,
instead of a scoop, was chosen.  In a plain duct, all that matters is the
pressure differential.  Since the system is sealed, the engine provides a
low pressure side so air flows in.

> I am even more interested in that sequential 6 speed transmission from
Australia. Does anyone have info on that unit?

I did a quick search and came across someone who mentioned it cost him $30K
USD to get one to the United States for his project.

> The rear deck lid wing is one of the best looking wings on Panteras.  At
least they got that part right.

It's really more a decklid spoiler and I wonder what sort of airflow it
actually sees.  The flow detaches at the aft edge of the roof.  The
question is does it re-attach before the decklid spoiler or is the only
meaningful flow coming in from around the sides of the car?  In the first
part of the build, they made mention of putting the Pantera in a wind
tunnel but, if they did, it was not shown in the second part.  Oddly, the
Cobra Daytona replica had a very large and tall rear wing even though the
flow on that vehicle stays attached, thanks to the truncated tear drop body
shape (a.k.a. Kamm back).  A wing is more efficient than a lip spoiler and
they had extra front end down force (from the tri-plane front spoiler) so
perhaps they needed the rear wing to balance it out.  Still, the rear wing
size seems excessive.

> It all looked very staged and scripted to me right down to the racing

Ditto.  It was obviously a Ford Racing/NASCAR publicity stunt.

> Sure would be nice if the parts were listed somewhere!

Since Ford Racing supplied both engines (and probably more), I would have
thought they would have gotten into more detail on them.

> With EFI I guess any ram air effect isn't a big deal as the MAF/MAP
sensor will adjust for the right Air/Fuel ratio, but I assume the ECU
mapping would have to compensate for overall fuel charge?

The Pantera had no ram air effect to deal with but, in general, yes.

> The car was done by some group - maybe for TV - or auction - or something
- that had a scoop going over the cockpit and into the engine bay. I think
it had a high performance V-6

That was built for the same "Fast and Loud" TV show when Aaron Kaufmann was
still working there.  It was a modified Ford 3.5L Ecoboost V6.


https://www.drivingline.com/articles/an-ecoboosted-pantera-you-ll-go-bananas-for/

> BUT - my point (or question) is: does air go IN or OUT of the screen
behind the cockpit.

If that scoop had been properly designed, it would have had a sealed path
to the engine so the flow in the engine compartment is irrelevant.
However, the scoop was way too low with the inlet opening area directly in
the dead zone of the boundary layer.

Dan Jones
-------------- next part --------------
   > Did the NASCAR guys not know about the Pantera side boundary air
   layer or did they know that their design would work and ignored the
   boundary layer?
   It's not clear if the NASCAR guys were involved in picking the location
   of the inlet duct or it chosen by the monkeys.A  If the NASCAR guys had
   chosen the duct, I would have thought they would have used a NACA
   inlet.A  In any case, the boundary layer effect is of no consequence
   since a plain duct, instead of a scoop, was chosen.A  In a plain duct,
   all that matters is the pressure differential.A  Since the system is
   sealed, the engine provides a low pressure side so air flows in.
   > I am even more interested in that sequential 6 speed transmission
   from Australia. Does anyone have info on that unit?
   I did a quick search and came across someone who mentioned it cost him
   $30K USD to get one to the United States for his project.
   > The rear deck lid wing is one of the best looking wings on
   Panteras.A  At least they got that part right.
   It's really more a decklid spoiler and I wonder what sort of airflow it
   actually sees.A  The flow detaches at the aft edge of the roof.A  The
   question is does it re-attach before the decklid spoiler or is the only
   meaningful flow coming in from around the sides of the car?A  In the
   first part of the build, they made mention of putting the Pantera in a
   wind tunnel but, if they did, it was not shown in the second part.A
   Oddly, the Cobra Daytona replica had a very large and tall rear wing
   even though the flow on that vehicle stays attached, thanks to the
   truncated tear drop body shape (a.k.a. Kamm back).A  A wing is more
   efficient than a lip spoiler and they had extra front end down force
   (from the tri-plane front spoiler) so perhaps they needed the rear wing
   to balance it out.A  Still, the rear wing size seems excessive.A A
   > It all looked very staged and scripted to me right down to the racing
   Ditto.A  It was obviously a Ford Racing/NASCAR publicity stunt.
   A A A A A
   > Sure would be nice if the parts were listed somewhere!A A
   Since Ford Racing supplied both engines (and probably more), I would
   have thought they would have gotten into more detail on them.
   > With EFI I guess any ram air effect isn't a big deal as the MAF/MAP
   sensor will adjust for the right Air/Fuel ratio, but I assume the ECU
   mapping would have to compensate for overall fuel charge?
   The Pantera had no ram air effect to deal with but, in general, yes.
   > The car was done by some group - maybe for TV - or auction - or
   something - that had a scoop going over the cockpit and into the engine
   bay. I think it had a high performance V-6
   That was built for the same "Fast and Loud" TV show when Aaron Kaufmann
   was still working there.A  It was a modified Ford 3.5L Ecoboost V6.
   A [1]https://www.drivingline.com/articles/an-ecoboosted-pantera-you-ll-
   go-bananas-for/
   > BUT - my point (or question) is: does air go IN or OUT of the screen
   behind the cockpit.
   If that scoop had been properly designed, it would have had a sealed
   path to the engine so the flow in the engine compartment is
   irrelevant.A  However, the scoop was way too low with the inlet opening
   area directly in the dead zone of the boundary layer.
   Dan Jones

References

   1. https://www.drivingline.com/articles/an-ecoboosted-pantera-you-ll-go-bananas-for/